[linux-2.6-block.git] / include / linux / quotaio_v2.h

/*
 *	Definitions of structures for vfsv0 quota format
 */

#ifndef _LINUX_QUOTAIO_V2_H
#define _LINUX_QUOTAIO_V2_H

#include <linux/types.h>
#include <linux/quota.h>

/*
 * Definitions of magics and versions of current quota files
 */
#define V2_INITQMAGICS {\
	0xd9c01f11,	/* USRQUOTA */\
	0xd9c01927	/* GRPQUOTA */\
}

#define V2_INITQVERSIONS {\
	0,		/* USRQUOTA */\
	0		/* GRPQUOTA */\
}

/*
 * The following structure defines the format of the disk quota file
 * (as it appears on disk) - the file is a radix tree whose leaves point
 * to blocks of these structures.
 */
struct v2_disk_dqblk {
	__le32 dqb_id;		/* id this quota applies to */
	__le32 dqb_ihardlimit;	/* absolute limit on allocated inodes */
	__le32 dqb_isoftlimit;	/* preferred inode limit */
	__le32 dqb_curinodes;	/* current # allocated inodes */
	__le32 dqb_bhardlimit;	/* absolute limit on disk space (in QUOTABLOCK_SIZE) */
	__le32 dqb_bsoftlimit;	/* preferred limit on disk space (in QUOTABLOCK_SIZE) */
	__le64 dqb_curspace;	/* current space occupied (in bytes) */
	__le64 dqb_btime;	/* time limit for excessive disk use */
	__le64 dqb_itime;	/* time limit for excessive inode use */
};

/*
 * Here are header structures as written on disk and their in-memory copies
 */
/* First generic header */
struct v2_disk_dqheader {
	__le32 dqh_magic;	/* Magic number identifying file */
	__le32 dqh_version;	/* File version */
};

/* Header with type and version specific information */
struct v2_disk_dqinfo {
	__le32 dqi_bgrace;	/* Time before block soft limit becomes hard limit */
	__le32 dqi_igrace;	/* Time before inode soft limit becomes hard limit */
	__le32 dqi_flags;	/* Flags for quotafile (DQF_*) */
	__le32 dqi_blocks;	/* Number of blocks in file */
	__le32 dqi_free_blk;	/* Number of first free block in the list */
	__le32 dqi_free_entry;	/* Number of block with at least one free entry */
};

/*
 *  Structure of header of block with quota structures. It is padded to 16 bytes so
 *  there will be space for exactly 21 quota-entries in a block
 */
struct v2_disk_dqdbheader {
	__le32 dqdh_next_free;	/* Number of next block with free entry */
	__le32 dqdh_prev_free;	/* Number of previous block with free entry */
	__le16 dqdh_entries;	/* Number of valid entries in block */
	__le16 dqdh_pad1;
	__le32 dqdh_pad2;
};

#define V2_DQINFOOFF	sizeof(struct v2_disk_dqheader)	/* Offset of info header in file */
#define V2_DQBLKSIZE_BITS	10
#define V2_DQBLKSIZE	(1 << V2_DQBLKSIZE_BITS)	/* Size of block with quota structures */
#define V2_DQTREEOFF	1		/* Offset of tree in file in blocks */
#define V2_DQTREEDEPTH	4		/* Depth of quota tree */
#define V2_DQSTRINBLK	((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk))	/* Number of entries in one blocks */

#endif /* _LINUX_QUOTAIO_V2_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Definitions of structures for vfsv0 quota format
	3	*/
	4
	5	#ifndef _LINUX_QUOTAIO_V2_H
	6	#define _LINUX_QUOTAIO_V2_H
	7
	8	#include <linux/types.h>
	9	#include <linux/quota.h>
	10
	11	/*
	12	* Definitions of magics and versions of current quota files
	13	*/
	14	#define V2_INITQMAGICS {\
	15	0xd9c01f11, /* USRQUOTA */\
	16	0xd9c01927 /* GRPQUOTA */\
	17	}
	18
	19	#define V2_INITQVERSIONS {\
	20	0, /* USRQUOTA */\
	21	0 /* GRPQUOTA */\
	22	}
	23
	24	/*
	25	* The following structure defines the format of the disk quota file
	26	* (as it appears on disk) - the file is a radix tree whose leaves point
	27	* to blocks of these structures.
	28	*/
	29	struct v2_disk_dqblk {
	30	__le32 dqb_id; /* id this quota applies to */
	31	__le32 dqb_ihardlimit; /* absolute limit on allocated inodes */
	32	__le32 dqb_isoftlimit; /* preferred inode limit */
	33	__le32 dqb_curinodes; /* current # allocated inodes */
	34	__le32 dqb_bhardlimit; /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
	35	__le32 dqb_bsoftlimit; /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
	36	__le64 dqb_curspace; /* current space occupied (in bytes) */
	37	__le64 dqb_btime; /* time limit for excessive disk use */
	38	__le64 dqb_itime; /* time limit for excessive inode use */
	39	};
	40
	41	/*
	42	* Here are header structures as written on disk and their in-memory copies
	43	*/
	44	/* First generic header */
	45	struct v2_disk_dqheader {
	46	__le32 dqh_magic; /* Magic number identifying file */
	47	__le32 dqh_version; /* File version */
	48	};
	49
	50	/* Header with type and version specific information */
	51	struct v2_disk_dqinfo {
	52	__le32 dqi_bgrace; /* Time before block soft limit becomes hard limit */
	53	__le32 dqi_igrace; /* Time before inode soft limit becomes hard limit */
	54	__le32 dqi_flags; /* Flags for quotafile (DQF_) /
	55	__le32 dqi_blocks; /* Number of blocks in file */
	56	__le32 dqi_free_blk; /* Number of first free block in the list */
	57	__le32 dqi_free_entry; /* Number of block with at least one free entry */
	58	};
	59
	60	/*
	61	* Structure of header of block with quota structures. It is padded to 16 bytes so
	62	* there will be space for exactly 21 quota-entries in a block
	63	*/
	64	struct v2_disk_dqdbheader {
65	__le32 dqdh_next_free; /* Number of next block with free entry */
66	__le32 dqdh_prev_free; /* Number of previous block with free entry */
67	__le16 dqdh_entries; /* Number of valid entries in block */
68	__le16 dqdh_pad1;
69	__le32 dqdh_pad2;
70	};
71
72	#define V2_DQINFOOFF sizeof(struct v2_disk_dqheader) /* Offset of info header in file */
73	#define V2_DQBLKSIZE_BITS 10
74	#define V2_DQBLKSIZE (1 << V2_DQBLKSIZE_BITS) /* Size of block with quota structures */
75	#define V2_DQTREEOFF 1 /* Offset of tree in file in blocks */
76	#define V2_DQTREEDEPTH 4 /* Depth of quota tree */
77	#define V2_DQSTRINBLK ((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk)) /* Number of entries in one blocks */
78
79	#endif /* _LINUX_QUOTAIO_V2_H */